Agent-Mediated Electronic Commerce III: Current Issues in by Gustavo E. de Paula, Francisco S. Ramos, Geber L. Ramalho

By Gustavo E. de Paula, Francisco S. Ramos, Geber L. Ramalho (auth.), Frank Dignum, Ulises Cortés (eds.)

In this e-book we current a set of papers round the subject of Agent-Mediated digital trade. lots of the papers originate from the 3rd workshop on Agent{Mediated digital trade held at the side of the self sustaining brokers convention in June 2000. After prior workshops, one in the course of the self reliant brokers convention in 1998 in Minneapolis and the second along with the overseas Joint convention On Arti cial Intelligence in 1999, this workshop endured the culture of the former ones by way of atmosphere the scene for the evaluation of the demanding situations that Agent-Mediated digital trade faces in addition to the possibilities it creates. by means of targeting age- mediated interactions, experts from di erent disciplines have been introduced jointly who give a contribution theoretical and alertness views within the narrowly concentrated subject that however consists of large ranging issues akin to: agent architec- res, institutionalization, fiscal conception, modeling, criminal frameworks and coverage directions. the most subject matters for the workshop have been: { digital negotiation versions for brokers { Formal matters for brokers that function in digital marketplace locations { digital buying and selling associations and structures { buying and selling recommendations for interrelated transactions (respectively auctions) The workshop bought 12 submissions of which 7 have been chosen for ebook during this quantity. even though the variety of submissions used to be much less then anticipated for an enormous sector like agent-mediated digital trade there's no cause to fret that this region doesn't get adequate consciousness from the agent community.

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Our current work includes extending the presented approach to more flexible negotiation with fuzzy constraints [5, 23], multiple party negotiation including dynamic coalition formation On Constraint-Based Reasoning in e-Negotiation Agents 45 [26] and improving negotiation strategies by learning from experience, modeling opponents and adaptation [27]. In particular it has led to the development of a fuzzy version of the eNAs system that uses the principles of fuzzy constraint-based reasoning in order to deal with imprecise information during negotiation (see [5, 23]).

G. reservation prices). For example the acceptability criteria used by the eNAs agents are defined in Table 2. Table 2. Acceptability criteria for the seller and buyer agents buyer B ( seller S ( ) ) v B price S , warranty S , tradein S ≥ v B* v S price B , warranty B , tradein B ≥ v S * price ≤ price price ≥ price S where: B B* ( v B* = d Bv B priceB* , warrantyB* , tradeinB* ) where: ( S* vS* = d S vS priceS*, warrantyS*, tradeinS* ) It should be noted that the acceptability criteria also play an important role as constraints on the ranges of available solutions during generation of offers.

The branch and bound solver of the Negotiation Engine allows an agent to generate its solutions in decreasing order of utility. The first (best) solution is obtained by running the solver on the original constraints. The next best solution is obtained by logically negating the previous best solution, adding it as a constraint and solving the resulting more constrained problem. Because a solution s is logically the conjunction of all subinterval goals that are ‘on’, the negation of a solution is a disjunction (choice) of the negations of each ‘on’ subinterval goal in the solution.

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